Element of a contact tube



FIG. 1 shows a top, rear and side perspective view of a element of a contact tube, showing our new design;

FIG. 2 shows a side view thereof;

FIG. 3 shows a top view thereof;

FIG. 4 shows an opposite side view thereof;

FIG. 5 shows a bottom view thereof;

FIG. 6 shows a rear view thereof; and,

FIG. 7 shows a front view thereof. 

The ornamental design for a element of a contact tube, as shown and described. 